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Share-Based Compensation - Additional Information (Detail) (USD $)
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3 Months Ended | 12 Months Ended | 3 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Mar. 31, 2014
Incentive_Plan
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Mar. 31, 2013
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Mar. 31, 2014
Non-Employee Stock Options [Member]
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Mar. 31, 2013
Non-Employee Stock Options [Member]
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Mar. 31, 2014
Stock Options [Member]
Employees
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Mar. 31, 2013
Stock Options [Member]
Employees
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Mar. 31, 2014
Employee Stock Options [Member]
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Mar. 31, 2013
Employee Stock Options [Member]
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Mar. 31, 2014
Common Stock Awards [Member]
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Mar. 31, 2013
Common Stock Awards [Member]
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Dec. 31, 2012
JSOP Awards [Member]
Employees
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Dec. 31, 2010
JSOP Awards [Member]
Employees
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Mar. 31, 2014
2012 JSOP [Member]
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Mar. 31, 2013
2012 JSOP [Member]
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Dec. 31, 2012
2012 JSOP [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||||||||||||
| Share-based compensation | $ 388,925 | $ 105,085 | $ 5,447 | $ 10,549 | $ 13,073 | $ 11,802 | $ 25,500 | $ 13,820 | $ 344,905 | $ 68,914 | |||||
| Number of incentive stock plans | 2 | ||||||||||||||
| Acquisition date | Jan. 23, 2014 | ||||||||||||||
| Options exercised | 0 | 0 | 1,984,080 | 0 | 0 | ||||||||||
| Number of employees, stock options granted | 0 | 0 | |||||||||||||
| Cash received from stock options exercises | 101,933 | ||||||||||||||
| Options granted | 0 | 0 | 36,905 | 40,016 | |||||||||||
| Awards authorized but not issued | 0 | ||||||||||||||
| Awards issued | 8,986,281 | 1,701,913 | |||||||||||||
| Number of employees, shares issued under JSOP | 2 | 2 | |||||||||||||
| Fair value of award | $ 853,889 | ||||||||||||||